Essential oil diffuser



FIG. 1 is a front view of an essential oil diffuser;

FIG. 2 is a rear view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a side view thereof;

FIG. 6 is a bottom right front perspective view thereof; and,

FIG. 7 is a top left rear perspective view thereof.

In the drawings, the broken lines depict portions of the essential oil diffuser that form no part of the claimed design. 

CLAIM The ornamental design for an essential oil diffuser, as shown and described. 